$button-back: (
  icon-margin: getCssVar(spacing, extra-tight),
  icon-max-width: getCssVar(width-icon, medium),
  icon-max-height: getCssVar(width-icon, medium),
);

@include b(button-back) {
  @include set-component-css-var(button-back, $button-back);

  width: 100%;
  padding: getCssVar(spacing, tight);
  overflow: hidden;

  @include e('icon') {
    width: 20px;
    height: 20px;
    cursor: pointer;
  }

  @include when(loading) {
    .el-button {
      .#{bem(icon)} {
        display: none;
      }
    }
  }
}
